Freescale Semiconductor StarCore SC140 - Manual (Page 517)

INSERT
SC140 DSP Core Reference Manual A-203
INSERT
Insert Bit Field (DALU)
INSERT
Description
These operations insert a bit field from a source data register (Db) into the destination data register (Dn).
The bits outside of the inserted field in the destination register are unchanged. In addition, the source
register is unchanged.
Status and Conditions that Affect Instruction
None.
Status and Conditions Changed by Instruction
Example
insert #12,#22,d6,d7
Operation Assembler Syntax
Db[(width – 1):0]
→ Dn[(offset + width – 1):offset]
width = #U6; offset = #u6 INSERT #U6,#u6,Db,Dn {0
≤ U6 ≤ 40}
{0
≤ u6 ≤ 40}[#U6 + #u6 ≤ 40]
width = Da[13:8]; offset = Da[5:0] INSERT Da,Db,Dn {0
≤ Da[5:0] ≤ 40}
{0
≤ Da[13:8] ≤ 16}{Da[13:8] + Da[5:0]
≤ 40}
INSERT #U6,#u6,Db,Dn
Uses two immediate unsigned 6-bit integers for the width (#U6) and offset (#u6).
INSERT Da,Db,Dn
Uses a supplemental data register Da for the width (bits 13:8) and the offset (bits 5:0).
Register Address Bit Name Description
Ln L Clears the Ln bit in the destination register.
Register/Memory Address Before After
D6 $FF AF6C 3465
L7:D7 $0:$00 0000 000F $0:$01 1940 000F
1 1 1 1 1 1 1 1 1 0 1 0 1 1 1 1 0 1 1 0 1 1 0 0 0 0 1 1 0 1 0 0 0 1 1 0 0 1 0 1
0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
0
1
6 3
2 3
9
D6
D7
OFFSET = 22
WIDTH = 12